Exhibit 10.13    Purchase Order No. K-99-181662 with Lockheed Martin Idaho
                 Technologies Company, later assigned to Betchel BWXT Idaho, LLC

LMITCO Form                                                               Page 1
PROC-1811a
04/99

                          PURCHASE ORDER NO. K99-181662
               LOCKHEED MARTIN IDAHO TECHNOLOGIES COMPANY (LMITCO)
                               225 Fremont Avenue
                    P.O. Box 1625, Idaho Falls, ID 83415-3521
         OPERATING UNDER U.S. GOVERNMENT CONTRACT NO. DE-AC07-94ID13223

To:  Orbit Technologies, Inc.                      Effective Date: 05/26/1999
     5950 La Place Court
     Suite 140
     Carlsbad, CA 92008

     To: James A. Giansiracusa                     Completion Date: 09/15/1999
     Phone: (760) 918-9168
     Fax No. (760) 918-9213
--------------------------------------------------------------------------------

1.   STATEMENT OF WORK
--   -----------------

         1.1.     The Subcontractor shall furnish the services as detailed in
                  the Statement of Work entitled, "Polysiloxane Encapsulation of
                  Calcined Waste", dated 05/06/1999, Rev. 1, and in accordance
                  with the requirements, terms and conditions specified or
                  referenced in this Purchase Order.

         1.2.     This is a fixed rate, ceiling priced, level-of-effort Purchase
                  Order for the period of 05/26/1999 through 09/15/1999. The
                  quantity of hours shown is an estimate to be used during the
                  specified period of this Purchase Order. The estimated
                  quantity does not obligate, guarantee, or imply that this
                  quantity will be purchased. Payment will be made for services
                  rendered and accepted by LMITCO. Pricing, (i.e., fixed labor
                  rates) is firm for the specified period of this Purchase
                  Order.

2.       RESOURCES
--       ---------

         2.1.     The Subcontractor shall provide all resources, e.g. materials,
                  labor, tooling, equipment and facilities, necessary to fulfill
                  the requirements of this Purchase Order, except as otherwise
                  specified.

3.       APPLICABLE DOCUMENTS
--       --------------------

         The Statement of Work entitled, "Polysiloxane Encapsulation of Calcined
         Waste", dated 05/06/1999, Rev. 1 is incorporated into and becomes a
         part of this Purchase Order.

<PAGE>

4.       TERMS AND CONDITIONS
--       --------------------

         4.1.     General Provisions: The following document is incorporated by
                  reference and hereby forms a part of this action: Lockheed
                  Martin Idaho Technologies Company General Provisions for
                  Non-Construction Purchase Order and Subcontracts, Form
                  PROC-183, Rev. August 1996. Note: LMITCO's General Provisions
                  are available on the following Internet address:
                  http://www.inel.gov/procurement/litco/forms/html.

<TABLE>
<CAPTION>
------------------------------------- ------------------------------------ -----------------------------------
Procurement Agent: C.F. Cloud         Telephone: (208) 526-5596            Ceiling Price: $60,000,000
------------------------------------- ------------------------------------ -----------------------------------
Ship via: N/A                         F.O.B./Trans.: N/A                   Cash Terms: Net 10 days
------------------------------------- ------------------------------------------------------------------------
<S>                                   <C>                                                             <C>
Billing Address:                      Signed:/s/C.F. loud                                             5-26-99
----------------                             -----------------------------------------------------------------
                                             Lockheed Martin Idaho Technologies Company               Date
Accounts Payable
LMITCO                                Title:       Procurement Agent
P.O. Box 1625
Idaho Falls, ID 83415-3117            LMITCO CONSTRUES THIS ORDER TO BE AN ACCEPTANCE OF SUBCONTRACTOR'S
Procurement Agent: C.F. Cloud         OFFER AND MAKES THIS ACCEPTANCE EXPRESSLY CONDITIONAL UPON
                                      SUBCONTRACTORS'ASSENT TO ANY TERMS OF THIS ACCEPTANCE THAT DIFFER
                                       FROM, OR ARE ADDITIONAL TO, THOSE OF SUBCONTRACTOR'S OFFER.
                                      PERFORMANCE BY SUBCONTRACTOR OF ANY WORK CONTEMPLATED BY THIS ORDER
                                      SHALL CONSTITUTE SUCH ASSENT BY SUBCONTRACTOR. IF, HOWEVER,
                                      SUBCONTRACTOR CONSTRUES THIS ORDER TO BE AN OFFER, ACCEPTANCE IS
                                      EXPRESSLY LIMITED TO THE TERMS OF THIS OFFER AND LMITCO HEREBY
                                      NOTIFIES SUBCONTRACTOR OF LMITCO'S OBJECTION TO ANY DIFFERENT OR
                                      ADDITIONAL TERMS IN SUBCONTRACTOR'S ACCEPTANCE.
------------------------------------- ------------------------------------------------------------------------
</TABLE>

<PAGE>

          LMITCO FORM
          PROC-1811a
          04/99
                   Lockheed Martin Idaho Technologies Company
                          Purchase Order No. K99-181662
                                   Page 2 of 3
--------------------------------------------------------------------------------

             4.2.  Article A.16, Disputes: Add the following paragraph: "The
                   parties agree that Alternate Dispute Resolution (ADR) is an
                   option for resolving disputes pertaining to this Subcontract
                   and, upon the mutual agreement of the parties, ADR will be
                   utilized. The particular ADR process to be used must also be
                   mutually agreed upon and set forth in a written agreement
                   signed by the parties. Possible ADR procedures include, but
                   are not limited to: (a) a neutral party to preside over the
                   resolution process; (b) mediation; and (c) binding
                   arbitration".

             4.3.  Certification of Eligibility : Subcontractor, by entering
                   into this Purchase Order, certifies that it is not debarred,
                   or proposed for debarment, or suspended or has not otherwise
                   been declared ineligible from receiving Federal contracts.
                   Disclosure that Subcontractor was ineligible for Federal
                   contracts on or before the effective date of this Purchase
                   Order shall constitute an additional basis for termination
                   under the Default Article of the General Provisions.

             4.4.  Sales Tax: LMITCO has been granted Direct Pay Authority for
                   Idaho Sales Tax by the Idaho Tax Commission.

             4.5.  Utilization of Former Employees: Except as approved by LMITCO
                   in advance, Subcontractor shall not utilize former LMITCO or
                   Coleman employees who participated in the early retirement
                   program of 1995. This restriction also applies to any
                   lower-tier Order(s) awarded by the Subcontractor.

             4.6.  Anti-Kickback Act: By acceptance of this Purchase Order,
                   Subcontractor certifies that it has not and shall not make or
                   solicit kickbacks in violation of the Anti-Kickback Act of
                   1986.
           5. PRICE
           --------

             5.1.  The ceiling price of this Purchase Order is $60,000.00.

             5.2.  LMITCO shall not be obligated to pay the Subcontractor any
                   amount in excess of the ceiling price established in the
                   Purchase Order, and the Subcontractor shall not be obligated
                   to continue performance, if to do so, would exceed that price
                   ceiling, unless and until, LMITCO shall have notified the
                   Subcontractor, in writing, that such price ceiling has been
                   increased and shall have specified in such notice a revised
                   price ceiling, which shall thereupon constitute the price
                   ceiling for performance under this Purchase Order.

             5.3.  Labor: The ceiling price for labor is $50,000.00. The
                   Subcontractor shall be paid at the hourly labor rates
                   established herein up to 1016 hours for services rendered in
                   performing the statement of work. The hourly labor rates are
                   fully burdened, i.e., they include all elements of direct and
                   indirect cost. The Subcontractor shall maintain suitable
                   records showing time actually expended by employees by name
                   and applicable labor category; these records must be
                   furnished to LMITCO, upon LMITCO's request.

                   ---------------------------------- --------------------
                       Individual/Labor Category        Rate
                   ---------------------------------- --------------------
                   Project Administrator              $125.00

                   ---------------------------------- --------------------

                   Technical Staff                    $70.00
                   ---------------------------------- --------------------

                   Consultant                         $70.00
                   ---------------------------------- --------------------
                   Student                            $30.00

                   ---------------------------------- --------------------

          5.4.    Materials: The Subcontractor shall support all material costs
                  claimed by submitting paid invoices or storeroom requisitions.
                  Except as otherwise provided in the schedule, materials as
                  referenced by this clause are defined as those materials which
                  enter directly into the work product or which are used or
                  consumed directly in connection with the work. The
                  Subcontractor shall, to the extent of its ability, procure
                  materials at the most advantageous prices available, with due
                  regard to securing prompt delivery of compliant materials,
                  taking all cash and trade discounts, rebates, allowances,
                  credits, salvage, commissions, and, when unable to take
                  advantage of such benefits, notifying LMITCO promptly to that
                  effect and the reason therefore. Credit shall be given LMITCO
                  for the aforementioned allowances et al. and the value of

<PAGE>

           LMITCO FORM
           PROC-1811a
           04/99
                   Lockheed Martin Idaho Technologies Company
                          Purchase Order No. K99-181662
                                   Page 3 of 3
--------------------------------------------------------------------------------

                   resulting scrap accrued to the benefit of the Subcontractor
                   or would have accrued except for the fault or neglect of the
                   Subcontractor. Such benefits lost through no fault or neglect
                   of the Subcontractor shall not be deducted from gross costs.

             5.5.  Miscellaneous Expenses: The Subcontractor shall be reimbursed
                   for miscellaneous expenses (e.g., copy charges, telephone and
                   fax charges, computer time).

             5.6.  Billing and Payment: Subcontractor shall be paid upon the
                   submission of itemized monthly invoices for services rendered
                   during the preceding calendar month, less deductions, if any,
                   as herein provided. Invoices must be substantiated a
                   breakdown or list of personnel, labor category, hourly rate
                   and dates of service covered by the invoice. Labor costs will
                   be computed by multiplying the appropriate hourly ;rate set
                   forth above by the number of direct labor hours actually
                   expended in performance of work. Fractional parts of an hour
                   shall be payable to the nearest half hour. Subcontractor
                   personnel will be paid for travel time when travel is
                   required during the normal working day (8:00 a.m. to 5:00
                   p.m. weekdays, excluding holidays and weekend travel). The
                   hourly rates shown are applicable to all services, regardless
                   of whether they were performed at straight time or overtime
                   work.

          6. COMPLETION DATE
          ------------------

             6.1.  This Purchase Order shall be in effect through 09/15/1999.

           7. INSPECTION/ACCEPTANCE
           ------------------------

             7.1.  Final inspection of material, equipment or services
                   under this Purchase Order will be performed at the INEEL
                   and acceptance occurs at the time LMITCO authorizes
                   final payment

           8. ADMINISTRATION
           -----------------

             8.1.  Subcontractor Administration: The Subcontractor's
                   responsibilities shall be administered by James A.
                   Giansiracusa.

             8.2.  Administrative and Legal Jurisdiction: Unless the
                   Subcontractor is otherwise notified in writing, LMITCO's
                   responsibilities under this action shall be administered by
                   C. F. Cloud, or an authorized Procurement Agent/Subcontract
                   Administrator (terms considered interchangeable) named
                   herein, Procurement Supervisor, or Procurement Manager.

             8.3.  Technical Jurisdiction and Occurrence Reporting
                   Representative: All work performed under this Purchase Order
                   shall be under the technical jurisdiction of Guy G. Loomis.
                   Such jurisdiction is to extend only to the assignment and
                   coordination of work within the work under this Purchase
                   Order.

             8.4.  Notices: Any notice provided for in this action shall be
                   considered as having been given:

                8.4.1.  To LMITCO, if mailed electronically via e-mail
                        ("cfc@inel.gov") or fax, or if delivered personally to
                        C. F. Cloud, or if mailed by U. S. Mail addressed to
                        3521, Procurement, LM1TC0, P. O. Box 1625, Idaho Falls,
                        Idaho 83415 - 3521; or

                8.4.2.  To the Subcontractor, if delivered personally to its
                        duly authorized representative at the site of work, or
                        if mailed electronically via e-mail or fax, or by U. S.
                        Mail addressed to the Subcontractor at 5950 La Place
                        Court, Suite 140, Carlsbad, CA 92008.

<PAGE>

                                Statement of Work
                  Polysiloxane Encapsulation of Calcined Waste
                                   May 6, 1999
                                     Rev. 1

               1.0      Introduction

                        Methods for the final disposition of reprocessed nuclear
                        fuel are being examined by the Department of Energy
                        (DOE). The DOE would like to avoid the high cost of
                        building a glass melter, which would melt the material
                        into a glass waste form for shipment to a Federal
                        permanent disposal site, by either temporarily
                        stabilizing the waste for shipment to an off site
                        melter, or by using a non-thermal encapsulation process
                        that would satisfy waste shipping and acceptance
                        criteria at the proposed disposal site. Polysiloxane
                        encapsulation is a potential candidate technology that
                        could achieve these goals.

                        Nuclear fuel was reprocessed at the Idaho Nuclear
                        Technology and Engineering Center (INTEC) at the Idaho
                        National Engineering and Environmental Laboratory
                        (INEEL) in a process that resulted in a dry granular
                        high level waste called Calcined waste. Lockheed Martin
                        Idaho Technologies Company (LMITCO) is tasked with
                        determining whether or not polysiloxane encapsulation is
                        a viable technology for disposing of this waste.

                        The polysiloxane encapsulation process is a simple room
                        temperature mixing process of the base material
                        (including proprietary fillers) with any dry granular
                        waste material and then adding a catalyst to stimulate a
                        silicon polymerization process. LMITCO requires the
                        assistance of a subcontractor in determining the
                        viability of this process as a waste disposal method.

               2.0      Scope/Technical Tasks

                        Stored at the INEEL INTEC is a variety of "pilot scale"
                        non-radioactive surrogates of the calcined waste. This
                        waste consists of salts and a variety of heavy metal
                        constituents and is, therefore, considered hazardous
                        material. The material is expected to be similar to that
                        formulated during the INEEL low level calcined waste
                        study performed by the subcontractor in 1998.

                        LMITCO shall ship to the subcontractor approximately 5
                        gal. of the pilot scale material for encapsulation with
                        polysiloxane. The subcontractor shall subject the
                        resultant waste forms to a variety of testing protocols.

                        The subcontractor shall submit to LMITCO for approval, a
                        test plan and a waste management plan. After approval by
                        LMITCO, the subcontractor shall assay a representative
                        sample of the pilot scale material to verify the heavy
                        metal composition. The subcontractor shall then perform
                        a mixing study in which a variety of scavengers will be
                        added to the waste and/or the polysiloxane material.
                        This final waste form shall not only be cohesive but
                        shall pass a Toxicity Characteristic Leach Procedure
                        (TCLP) test, performed in house (not by an outside
                        laboratory) by the subcontractor. A cohesive sample is
                        one in which the compressive strength is on the order of
                        400psi.

                                       1

<PAGE>

                        The subcontractor shall use the most promising mixture
                        of waste and polysiloxane (the mixture that gives the
                        highest waste loading and still passes TCLP and
                        compressive strength tests), to form a monolith, which
                        the subcontractor shall test using the testing protocol
                        defined by the Materials Characterization Center MCC- 1P
                        Static Leach Test Method. The subcontractor shall
                        subject the sample to the Department of Transportation
                        (DOT) oxidizer testing and corrosive testing.

                        The subcontractor shall form a sample of the material
                        and subject it to melting in a crucible to determine the
                        melting temperature of the mixture (a possible
                        subcontractor for this work is Corning Environmental
                        Laboratory Services).

                        The subcontractor shall summarize the results of these
                        studies in a letter report, which LMITCO wall
                        incorporate into an INEEL publication.

                        Finally, the subcontractor shall properly dispose of the
                        resultant material accumulated during the study
                        according to State and facility requirements. The
                        subcontractor may perform the above-described tasks in
                        any logical order following the approval of the test and
                        waste management plan submittals and performance of the
                        mixing study.

                        The subcontractor shall permanently dispose of all
                        residual materials as part of this project, and shall
                        provide all notifications to state and facility
                        authorities as required.

                3.0     Deliverables/Schedule

                o       The subcontractor shall submit a Waste Management Plan
                        including the method for final disposition of the
                        approximately 5 gal. of pilot scale material. This plan
                        will take the form of a letter report transmittal. Due
                        date May 31, 1999.
                o       The subcontractor shall submit a Test Plan that shall
                        include all procedures to be followed, all analytical
                        techniques to be used in the evaluation of the
                        encapsulation process and final waste form, and a
                        complete list of equipment to be used. The subcontractor
                        shall send this Plan to the INEEL as hard copy and Word
                        disc. Due date June 7, 1999.

                Testing Phase
                -------------

                o       The subcontractor shall prepare a mixing study starting
                        with the scavenger addition techniques used during FY-98
                        testing (low level calcined waste fraction work). Prior
                        to perforating the TCLP, the subcontractor shall
                        evaluate the waste form for heavy metal assay and shall
                        determine the ppm for heavy metals. The subcontractor
                        shall formulate the waste form with the highest possible
                        waste loading that will still pass the TCLP and provide
                        a solid monolith with between 300-500 psi compressive
                        strength. The TCLP testing will not require outside
                        laboratory verification, however, the subcontractor
                        shall document the results and procedures used.

                o       The subcontractor shall use the most favorable mix
                        obtained in the Mixing Study, and subject it to the MCC
                        -IP testing protocol. The subcontractor shall document
                        results.

<PAGE>

                o       Using the most favorable mix, the subcontractor shall
                        perform a specially designed "drop" test to determine
                        the resultant size distribution of the waste form
                        following a drop that simulates dropping a stainless
                        steel cylinder containing waste from a height of 9m onto
                        a pad simulating a standard cement roadbed. The
                        subcontractor may perform an acceptable substitute test
                        by subjecting the actual waste form to the same forces
                        that would be transmitted to the waste form inside the
                        canister. The subcontractor shall provide a CAMCORDER
                        record of this drop test and submit it with the other
                        collected data. In addition, the subcontractor shall
                        provide to LMITCO a still photographic record of the
                        before impact and after impact. The subcontractor shall
                        obtain the size distribution of the waste by using
                        standard geological soil sieves.

                o       Using the most favorable mix obtained in the Mixing
                        Study, the subcontractor shall subject the waste form to
                        "in house" DOT oxidizer testing and shall perform an
                        industry standard corrosiveness test.

                o       Using the most favorable mix obtained in the Mixing
                        Study, the subcontractor shall heat a small sample in a
                        crucible test to determine the melting temperature. This
                        work can be done "in house" or by an outside contractor
                        such as Corning Environmental Laboratories Services. The
                        subcontractor shall photograph the resultant "glass"
                        material against a high contrast background for visual
                        display.

                The subcontractor shall complete all of the required testing by
                September 1, 1999, and shall provide a final submittal with
                useable tabularized data, in hardcopy form as well as a WORD
                disc, along with negatives of any photographs such that report
                quality figures can be generated. Due date September 15, 1999.

                LMITCO Supplied items:

                o       LMITCO will ship to the subcontractor the approximately
                        5gal. of pilot scale waste for testing by June 15, 1999.
                        A one-for-one schedule slippage will be allowed to the
                        subcontractor in the event that there are unforeseen
                        delays in shipment of the material.
                o       LMITCO will publish the final report. In this report,
                        all past work on polysiloxane encapsulation studies will
                        be included along with the subject results. In addition,
                        LMITCO will include the radiation effects results based
                        on the Kurchakov Institute work sponsored by the
                        subcontractor. The subcontractor will be consulted for
                        verification of these test results before publication.
                o       LMITCO will ensure that the 1997 environmental audit of
                        the subcontractor facility is still valid. It is noted
                        here that the environmental audit performed by Ken
                        Gilbert of INEEL covered a much more restrictive case of
                        mixed waste (pad-A salts and the WERF ash), It is
                        assumed that shipment of essentially the same material
                        used in the FY-98 study, namely hazardous waste only,
                        will be considered covered under the prior audit.

                4.0     Applicable Documents/Special Considerations

                Attachment 1 is a copy of MCC- 1 P
                Attachment 2 is a copy of an approximate composition of the
                calcined waste. (Note: this is identical to that obtained during
                FY-98 testing)